Scale a pattern between within a ring domain

Hi I was wondering if any one can help me with a seemingly basic transform.

I'm trying to re-size a group of curves which are in a disc form and fit to a different size and thickness disc. i'd like them to scale within keeping their relationship within the disc.

Any Ideas?

Attachments:

Circle problem.jpg, 50 KB

Replies to This Discussion

Permalink Reply by Nenov Ivo on February 1, 2016 at 1:36pm

use the map to surf component

Attachments:

mapToSurf.gh, 7 KB

Permalink Reply by daniel koene on February 1, 2016 at 6:43pm

Thanks but that didn't work for what i was doing its not just a standard scale. the two rings vary in width. so the scaling is is more like a morph. is there any way to make the rings extents of the transposition rather than the whole box around them. is there a way of stretching the inner point of the ring to a different point than the outer point of the ring.

Permalink Reply by Laurent DELRIEU on February 1, 2016 at 11:27pm

There is a move control point component
I have not my PC but I think you can extract all your control points
Calculate the new position of control points with a linear interpolation
Calculate the vector between new and old and
Feed move control points component with old position and translation vector

Permalink Reply by Laurent DELRIEU on February 1, 2016 at 11:32pm

See this link the component is point deform
http://www.grasshopper3d.com/forum/topics/can-t-move-mesh-vertices?...

Permalink Reply by daniel koene on February 2, 2016 at 12:36am

Thanks I'll give it a go tomorrow.

Permalink Reply by Laurent DELRIEU on February 2, 2016 at 2:31pm

Hello,

here are a solution, to morph curves which are between 2 curves to 2 other curves.

The script uses "Point Deform" Component.

This script doesn't still work with closed curves.

Attachments:

morph_curves_between_curves.gh, 35 KB

Permalink Reply by Laurent DELRIEU on February 2, 2016 at 2:59pm

I tested my script with some changes, but it is not good.Circles are closed, end and beginning have same parameter ... I don't master enough domain, length parameter ... of curves.

The best must to use radius. If r is radius of control point, r1 r2 radius of circles FROM and R1, R2 radius TO. Your new crontrol point will have a radius of :

R= R1+ (R2-R1)*(r-r1)/(r2-r1).

Angle will be the same ... If you still have problem could you post your script ?

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